DaytonAudio DSPB Series User manual

DSPB Series User Manual
Table of Contents
1. What types of projects can be achieved with the DSPB series? What do I need to get started? .....3
A. DSPB Amplifiers Buying Guide / Examples ..................................................................................3
B. DSPB-K/KE preamp with DSP Buying Guide / Examples .............................................................4
2. Quick Start Guides.................................................................................................................................5
A. Before you start ................................................................................................................................5
B. DSPB-250 / DSPB-100 - Quick Start..................................................................................................6
C. Combining a DSPB Amplifier with a KAB Amplifier –Quick Start...................................................8
1) How to Power the Amplifiers .......................................................................................................8
2) Sharing Audio Between the Boards..............................................................................................8
3) Switch Control...............................................................................................................................9
D. DSPB - K / DSPB - KE - Quick Start ..................................................................................................10
E. Potentiometer Controls..................................................................................................................12
F. DSPB-ICP1 Sigma Studio Connection - Quick Start ........................................................................13
DAC Assignment Table........................................................................................................................15
3. Project examples using SigmaStudio..................................................................................................16
A. Creating a basic SigmaStudio project for any product from the DSPB series...............................16
DAC Assignment Table........................................................................................................................17
B. Writing to E2Prom –Burning custom SigmaStudio programs to non-volatile (non-temporary)
memory ...................................................................................................................................................20
C. Example –2.0 Channel Sigma Studio Project. ................................................................................22
D. Example –DSPB-100 Mono DSPB Sigma Studio Project. ..............................................................24
E. Example - DSPB-250 + KAB250v3 –Active 2-Way Speaker, 4.0 System .......................................25

F. Example - DSPB-100 + KAB-250v3 or DSPB-250 + KAB-100M–2.1 System ..................................27
G. Example –3 Way Active System With DSPB-250 and KAB-100M.................................................29
H. Example –DSPB-K + DSPB-KE –2.1 System ...................................................................................32
I. Example –DSPB-K + DSPB-KE –3-Way Crossover .........................................................................34
4. Wiring Diagrams..................................................................................................................................37
DSPB-100 .................................................................................................................................................37
DSPB-250 .................................................................................................................................................39
DSPB-K .....................................................................................................................................................41
DSPB-KE ...................................................................................................................................................42
DSPB-ICP1................................................................................................................................................43
5. Tips and Troubleshooting ...................................................................................................................44
A. DSPB Tips and Troubleshooting......................................................................................................44
B. ICP1 Sigma Studio Troubleshooting ...............................................................................................44
C. Sigma Studio Tips ............................................................................................................................45
Revision Log .................................................................................................................................................47

1.What types of projects can be achieved with the DSPB
series? What do I need to get started?
Each example project in section 3 has a required items list to achieve each project, but this section
summarizes this information into one section.
A. DSPB Amplifiers Buying Guide / Examples
The thoughtful design of the DSPB series of amplifiers is that they will work together with the existing
KAB line of amplifiers. The synergy of this relationship allows you to add Bluetooth to your DSPB, and
DSP to your KAB. Depending on your design goals, you will need different items from the DSPB line and
the KAB line to achieve those goals. The DSPB-250 is 2x50 watts, and the DSPB-100 is 1x100 watts.
The table below summarizes the different configurations that are possible with the DSPB amplifier and
KAB amplifier line. Look for the type of configuration you want on the leftmost column, and then look to
see which items you can use to achieve this in the following columns. There is available an example
SigmaStudio project for each configuration. Note that you will need only 1 DSPB-ICP1 programmer
board to program any number of amplifiers or preamps from the DSPB series. It can be thought of like
the bridge between the DSPB amp/preamp and the computer. It will also require a Windows PC so you
can use SigmaStudio. See the examples sections for more specifics about how these devices need to be
programmed to achieve this.
Configuration
DSPB
KAB
DSP
Bluetooth
Examples
0.1
DSPB-100
✓
Powered Subwoofer with custom DSP
1.0
DSPB-100
✓
Mono Speaker with custom DSP
1.0
KAB-100M
✓
Mono Bluetooth Speaker
2.0
DSPB-250
✓
Mono 2-Way Speaker w/ active x-overs,
Stereo 1-Way Speaker w/ DSP
2.0
KAB-250v3
✓
Stereo Bluetooth Speaker
2.0*
DSPB-100
KAB-100M
✓
✓
High Power Stereo Speaker w DSP and Bluetooth
2.1*
DSPB-100
KAB-250v3
✓
✓
Stereo Speaker w/ bluetooth, DSP and subwoofer OR 3-way speaker w/ active
crossovers
2.1*
DSPB-250
KAB-100M
✓
✓
Stereo Speaker w/ bluetooth, DSP and subwoofer OR 3-way speaker w/ active
crossovers
4.0*
DSPB-250
KAB-250v3
✓
✓
2-Way Stereo Speakers w/ active x-over, DSP and bluetooth
Note 1: *If a configuration requires both a DSPB amplifier and a KAB amplifier, the DSPB-EC Expansion
Cables (part # 325-129) are required to make the proper connections, as outlined in section 2.C
“Combining a DSPB Amplifier with a KAB Amplifier”
Note 2: This table uses KAB-100M and KAB-250v3 as examples of mono and stereo KAB boards, but
previous and lower power versions of the KAB line are compatible with the DSPB series as well.
Note 3: See the examples section once you decide on a configuration. This will have more information
about optional items you might want for specific scenarios.

Note 4: about 3-Way Amplified System with DSPB and KAB amplifiers
If you want to create a 3-way pair of speakers with all active crossovers and built in amplification, it is
possible with the combination of DSPB and KAB amplifiers and programming within SigmaStudio. To
create a powered, 3-way mono speaker, an example shopping list would be the following.
•DSPB-250 –Using 1 per 3-way speaker, these boards will power your tweeter and mid-woofer
and also house the DSP to achieve the active 3-way crossover
•KAB-100M –Using 1 per 3-way speaker, these boards will power your woofer, and will receive
its DSP / crossover from the DSPB-250.
•DSPB-ICP1 –This is the programmer board that acts as the bridge between your DSPB-250 and
the computer, allowing you to program your device with SigmaStudio (more details in the
following sections)
•DSPB-EC expansion cables –These cables are necessary to connect the DSPB-250 and KAB-100M
together.
If you wish to create a pair of 3-way speakers with this setup, it is possible by purchasing an additional
DSPB-250 and KAB-100M (you would need only 1 DSPB-ICP1), but note that you would not be able to
utilize the bluetooth of the KAB boards as your input unless your source device is capable of streaming
to multiple Bluetooth devices at the same time. Otherwise, you would need to split your analog input
source. A more detailed guide can be found in the examples section.
B. DSPB-K/KE preamp with DSP Buying Guide / Examples
The combination of the DSPB-K with the DSP-KE adds the connections necessary to create a 2 in, 3 out
DSP preamp system. This means that there are many possibilities for how to use them, which are listed
in the table below. It is recommended to purchase the DSPB-KE along with the DSPB-K. It is possible to
utilize the DSPB-K standalone, but Dayton Audio does not officially support means of making audio
in/out connections without the DSPB-KE.
The DSP-K is preconfigured to have basic filter adjustments available with the on-board potentiometers,
but to achieve more functions, a Dayton Audio DSPB-ICP1 is required along with a Windows PC, so
Analog Devices’ SigmaStudio software can be run to program the DSPB-K.
The table below shows the example configurations that the DSPB-K/KE can achieve. Project examples
and programming advice/ instructions are found further in this document.
Configuration
Examples
0.1
Add DSP to a powered subwoofer
1.0
Add DSP to a mono speaker / amplifier
2.0
Add DSP to a stereo amplifier
2.1
Add DSP and a subwoofer output to a stereo amplifier
3.0
Create a 3-way crossover using all DSP and no passive components

2.Quick Start Guides
The Dayton Audio DSPB series of boards leverages the powerful Analog Devices ADAU1701 DSP chip to
allow for almost limitless possibilities for sound customization. Out of the box, a DSPB-100/250 or a
DSPB-K will allow for quick adjustments with the convenient built in potentiometers, but to unlock the
full potential of the ADAU1701 processor, combine your board with a Dayton Audio DSPB-ICP1 to
connect directly to the SigmaStudio development tool provided by Analog Devices.
A. Before you start
1. Review the wiring diagrams found at the end of this document or on the product page for each
device before using this quick start guide. Refer to these diagrams as you’re following the quick
start guides.
2. Review the “What do I need to purchase?” guide above to make sure you have everything
needed to achieve your design goals.
3. Make sure that any speakers and input devices you plan on connecting to the DSPB are working
properly.
4. If planning to use SigmaStudio to use the full potential of the DSP, make sure you have
purchased at least one DSPB-ICP1, a micro USB cable capable of data transfer (some cables
included with devices that use a micro USB port for power are power only, and do not connect
the pins necessary for data transfer!), and make sure you have a Windows PC available to use
the free SigmaStudio software.
5. Take care when attaching and especially removing jumper cables from the DSPB.
a. A damaged cable can cause issues that are difficult to troubleshoot, such as noises like
popping or clicking. A damaged cable can also cause programming issues.
6. To achieve increased power from a DSPB amplifier, try increasing the input volume before
increasing the gain of the amp to max levels. This will generally result in a better response from
the amp.
a. For example, increase the volume of an attached mp3 player before adjusting the
potentiometer on the board to increase output volume.
7. Note that there is a ‘tips and troubleshooting’ section at the bottom of this document.

B. DSPB-250 / DSPB-100 - Quick Start
1. Connect the included 3.5mm jack to port J6 for audio input.
a. Note –J3, the 3.5mm jack on the board, is NOT for audio input.
2. Connect speakers to J10 according to the wiring diagram or by following the labels on the back
side of the board. This will be different for the DSP-250 vs. the DSPB-100.
a. If using a DSPB-100 (mono), it is recommended to bridge the two positive wires together
as well as the negative wires so they function like a thicker wire.
3. Connect power through either J9 if using a power adapter or use J8 if using a battery board.
a. It is recommended to use a power supply of at least 12V but less than or equal to 24V.
4. Audio should now play if the above connections are made correctly.
a. Troubleshooting
i. Check the included 3.5mm jack is connected to the correct pins of J6.
ii. Check the position of the on board potentiometers that affect gain and high
pass filters.
iii. Check that your audio source is functioning correctly.
iv. Check the speaker connections match the corresponding diagram. There is a
different diagram for the 250 (stereo) vs the 100 (mono).
v. If you attached an ICP1, detach it and do a power cycle.
5. Adjusting the potentiometers on the board labelled POT1-4 will allow quick adjustments without
any programming. See the potentiometers section (part E) for more details.
6. Once the basic connection is working, the DSPB is ready to be integrated into your project.
Further customization can be done by using the methods below.
a. App connection with the ICP1 for basic EQ or high and low pass filter adjustment
b. Sigma Studio connection with the ICP1 for nearly infinite custom DSP possibilities.
i. See the sample project files at the Parts Express Product page for your device.

c. Connection of a DSPB-250 or DSPB-100 with a Dayton Audio KAB board to utilize all 4
DSP outputs of the Analog Devices ADAU1701 processor. An example of this
configuration is detailed in the Active 2-way guide below.

C. Combining a DSPB Amplifier with a KAB Amplifier –Quick Start
This section assumes you have already read the Quick Start guide for the DSPB-250/100 which is directly
previous to this section.
1) How to Power the Amplifiers
a) The easiest method is to parallel the power connectors that come with all DSPB and KAB
amplifiers (physically tie the red wire for each connector together, and the same with the
black wire), and wire them to a single DC power jack (while observing the proper polarity
that your power supply requires).
i) Alternatively, the end connector of a 12-24V power supply can be cut off and the red
and black wires of the wiring harness’ can be connected directly to the power supplies
positive and negative wires. You might find this method to be useful during testing, if
you want to quickly get them powered and are without a bench power supply, but likely
not for a finished product.
b) For battery power, it is recommended to use the KAB-BE battery board, connected to the
KAB and DSPB in the way the diagram shows below. Note that J9, J10, and J11 all serve the
same function on the KAB-BE, so you can connect your KAB or DSPB to any of these ports.
i) NOTE: Only the KAB amplifier can charge the KAB-BE (through J3 on the KAB). The DSPB
will not be able to charge the KAB-BE.
2) Sharing Audio Between the Boards
1. Connect J5 on the DSPB amplifier to J11 on KAB amplifier with a 6 pin cable (this connection
shares the audio back and forth between the boards). (See the image below)
2. This connection allows for the following
a. Bluetooth can be used as an input for the DSPB amplifier
b. The KAB amplifier’s powered outputs can receive processed signals from the DSPB, even
when using Bluetooth as a source.
c. The end result of this connection is up to 4 channels of individually processed audio. For
an example of how to do this processing, see example 2.E or 2.F in the Sigma Studio
Examples section for how to utilize the 4 channels of DSP, or simply use the built-on
potentiometers to make basic adjustments without SigmaStudio.

3) Switch Control
The following 3-pin connection is critical to make when using these boards together, because otherwise
there will be a pop sound out of your speakers every few minutes. This connection prevents that.

D. DSPB - K / DSPB - KE - Quick Start
1. Provide power to the micro-usb jack (J2)
a. Note –the on board micro-usb jack will not provide access to Sigma Studio if hooked up
to a computer (but it can provide the DSPB-K power), an ICP1 is required for
programming with SigmaStudio or app control.
2. If using a DSPB-KE, using the provided 10 pin cable, connect J1 of the DSPB-K to J4 of the DSPB-
KE.
a. Follow the wiring diagram to make the desired input and output connections to the
DSPB-KE. There are many possibilities for connections, including 3.5mm, RCA, and
headers. Each port is clearly labelled on the bottom of the board for easy connection.
If not using the DSPB-KE, a custom solution will be required to get input and output from the
DSPB-K. All inputs and outputs are exposed through the J2 header, and each pin has a clear label
on the board under this header.
3. Set the switch on the DSPB-K to ‘1’ for playback mode.
4. If all of the correct connections are made and power is connected, the device should be
functioning. If not –
a. Press the reset button on the DSPB-K.
b. Check the position of the potentiometers.
c. Check that your output device is functioning correctly.
d. Check the connection between the DSPB-K and DSPB-KE is secure on each board.
e. Check the 10 pin cable that connects the DSPB-K to the DSPB-KE
f. Check that your input device is functioning correctly
g. Check that the switch on the DSP-K is set to ‘1’.
5. Adjusting the potentiometers on the board labelled POT1-4 will allow quick adjustments without
any programming.
a. POT1 –Subwoofer Gain Control (this affects the output from J10 of the DSPB-KE, the
sub out port)
b. POT2 –Subwoofer Low Pass Frequency Adjustment
c. POT3 –Stereo High Pass Frequency Adjustment
d. POT4 –Stereo Gain Control

6. Once the basic connection is working, the DSPB is ready to be integrated into your project.
Further customization can be done by using the methods below.
a. App connection with the ICP1 for basic EQ or high and low pass filter adjustment
b. Sigma Studio connection with the ICP1 for nearly infinite, custom DSP possibilities.
i. There are sample project files available on the product pages for the devices.
See the SigmaStudio examples section of this document for further explanation.
c. Connection of a DSPB-250 or DSPB-100 with a Dayton Audio KAB board to utilize all 4
DSP outputs of the Analog Devices ADAU1701 processor. An example of this
configuration is detailed in the Active 2-way guide.

E. Potentiometer Controls
The following table puts all of the default potentiometer controls into one location. Note that these
controls are only guaranteed to be valid if Sigma Studio has not been connected to the DSPB. If you
program your DSPB with your own program, the potentiometers will work based on how you assigned
them in your project.
DSPB-250 / DSPB-100 (High Pass Filter
Control)
DSPB-100
DSPB-K (Band Pass Filter
Control)
POT1
Gain Control –J3 & J5
Gain Control -J3 & J5
Sub Gain
POT2
High Pass Filter Control - J3&J5
Band Pass Control –J3&J5
Sub Low Pass Adjustment
POT3
High Pass Filter Control for Speaker Output –J10
Band Pass Filter Control for
Speaker Output –J10
Stereo High Pass Adjustment
POT4
Master Gain Control –J10, J5, J3
Master Gain Control –J3,
J5, J10
Stereo Gain
All filters are second order butterworth filters.
Device
Function
Frequency
Range
DSPB-250
High Pass Filter (J10)
250-2kHz
DSPB-100
Band Pass Filter (J10)
(See Graph Below)
DSPB-K
High Pass Filter (OUTR, OUTL)
60-120 Hz
Low Pass Filter (SUB)
200-400 Hz

F. DSPB-ICP1 Sigma Studio Connection - Quick Start
Note: Sigma Studio connection requires a Windows PC. This guide requires a basic knowledge of
computer operation, but it is not overly complex if the directions are closely followed.
1. Download and install the most recent version of SigmaStudio to your system
2. Make sure your ICP1 is disconnected from USB and from your DSPB before starting, to ensure
the proper steps are taken.
3. Open an example project from parts-express.com on any of the DSPB series product pages, or
use the following steps to setup the ‘hardware configuration’ menu in SigmaStudio. If using an
example project, skip to step 6 after opening it in Sigma Studio with File > Open.
4. Find the “USBi” block in the Communication Channels section of the tree toolbox and drag it in
to the white space like shown below.
5. Find the ADAU1701 and E2Prom blocks in the “Processors (ICs / DSPs)” section of the tree
toolbox and drag them into the white space like shown below. Then make the connections to
the USB block. The I2C addresses in the USB block will automatically populate correctly, there is
no need to change them.
a. Note: In this image below, the “USB Interface” represents your ICP1, the ADAU1701 is
the processor on your DSPB, and E2Prom is non-volatile memory on the DSPB that
programs ultimately will be written to.

6. Ensure that your ICP1 is not yet connected to the DSPB, and ensure that its switch is set to ‘1’.
7. Plug a micro USB cable into the PC running SigmaStudio, and then connect the cable to your
ICP1.
a. Note: If the connection below is not successful, it is imperative to try a different USB
cable. Many micro USB cables endure a lot of abuse from charging devices, and
although they might still provide power, they might have issues transferring data. Some
micro USB cables struggle to ever work properly with data at all.
8. If all is correct, you will see the USB block turn green, like below.
a. Note that this means that SigmaStudio recognises your ICP1, it does not indicate that
SigmaStudio recognises your DSPB.
9. If not already, make sure your DSPB is connected to its own power source. If the ICP1 is plugged
into the DSPB, but your DSPB does not have its own power, it will light up LEDs on the DSPB
(making it look like it is powered), but it will fail to program and function.
10. Once the USB block is green, plug the 6-pin connector on the ICP1 to the 6-pin programming
port on the DSPB (J8 for DSPB-100 or DSPB-250, J11 for DSPB-K). Your ICP1 will come with this
cable.
11. Following these steps, you should be ready to create custom configurations for your DSPB.
12. If using a completely new SigmaStudio project, usage of the potentiometers on the board
requires additional configuration. If using a sample project from Dayton Audio, this should
already be configured, but is worth checking anyway.

a. Enter the “hardware configuration tab”. This is where you will see the green USB block
like above.
b. Towards the bottom of your screen, select the “IC 1 – 170x\140x Register Control” Tab
c. Configure the section labelled with the red box in the image below as the image shows.
Without this step, the potentiometers will not work.
The DAC assignment table below is also elsewhere in this document, but will be useful if you intend to
create your own SigmaStudio project or modify a sample project.
DAC Assignment Table
DSPB-250
DSPB-100
DSPB-KE
DAC0
J10
J10
OUTR
DAC1
J10
OUTL
DAC2
J3 or J5
J3 or J5
N/A
DAC3
J3 or J5
J3 or J5
SUB

3.Project examples using SigmaStudio
Warning: The PEQ filter used in the following project examples has a
bug that can cause damage to your tweeters or small speakers. To
avoid this bug, do not add new bands of EQ while your DSPB is
connected. If you must add new bands, disconnect your DSPB first! If
you add a new band while programming, it will cause a very loud
sound until you reprogram the device. This filter block otherwise
works fine and is safe for your speakers. This only applies to the
“PEQ” block.
A. Creating a basic SigmaStudio project for any product from the DSPB
series.
This is the tutorial to follow if you want to learn how to start from scratch building a SigmaStudio
project. If you would like to start out with a premade project, see the following sections for examples of
premade projects.
The simplest project you could create in Sigma Studio is a project that directly routs the inputs to the
outputs, but in this brief tutorial we will also add a master gain control. Please follow the ICP1
SigmaStudio connection guide and quick start guide for your specific DSPB (found in the previous
section) before following these instructions.
1. Enter the “schematic” tab near the top of the screen. This is assuming your hardware
configuration is already complete from the ICP1 connection to SigmaStudio guide.
2. Find “Input” and “Output” under the IO folder in the Tree Toolbox ion the left side of your
screen. Drag 1 input and 2 outputs to the whitespace in the schematic tab.

DAC Assignment Table
DSPB-250
DSPB-100
DSPB-KE
DAC0
J10
J10
OUTR
DAC1
J10
OUTL
DAC2
J3 or J5
J3 or J5
N/A
DAC3
J3 or J5
J3 or J5
SUB
3. It is recommended to add hardware-controlled gain on any project. There are multiple types of
volume controls, but for this tutorial we will use a control that can be controlled with one of the
onboard potentiometers. From the tree toolbox, find “Single slew ext vol” under Volume
Controls > Adjustable Gain > Ext Control > Clickless SW Slew. Drag this item into the schematic
whitespace.
4. Right click the SW vol 1 control, and grow the algorithm by 1 like shown below. This will allow us
to pass both input 0 and input 1 through the same volume control by adding an additional input
and output.

5. Find “Auxiliary ADC Input” in the tree toolbox under IO>GPIO>Input. Drag this control into the
project, and then connect everything together as shown below.
a. Note: If you have not followed the exact steps of the ICP1 SigmaStudio connection
guide, your potentiometers might not work, as they require additional configuration.
b. Note: We are using AUX_ADC_0 for this, which corresponds to POT1, but any POT could
be used using the drop down menu for the ADC block.
6. It is now time to test the program. Press the “Link Compile Download” button shown below.

7. If everything has been done correctly, you will see “Active: Downloaded” in the bottom right
corner of your window.
8. If the error message below is seen, please refollow the ICP1 SigmaStudio Connection Guide
section and ensure that all steps have been followed in the proper order. This message can
occur by connecting the USB cable and 6 pin programming connector to the DSPB in the wrong
order. If refollowing that guide does not fix the error, see the troubleshooting section at the end
of the document.
9. Once you have a design that you like, by pressing “link compile download” that design is only
saved to your DSP until the next power cycle. To permanently save your program, follow the
next section to save your program to E2Prom. To restore the original DSPB firmware (if writing

to E2Prom has not been completed), remove power from the DSPB, disconnect the ICP1 and
reconnect power to the DSPB.
B. Writing to E2Prom –Burning custom SigmaStudio programs to non-
volatile (non-temporary) memory
This step writes your custom program to non-volatile memory on the DSPB, which ensures that your
custom program runs on the DSP upon a new boot. This is essential for long term use, because when
you are connected to SigmaStudio testing configurations, that current program is stored in memory that
is volatile or temporary, meaning it is lost when there is a power cycle. If you find that your program is
lost on a power cycle, it means you have not written the program to E2Prom.
IMPORTANT –This step will erase the stock configuration of the board! This means that the default
functions of POT1-4 will reprogrammed or removed, depending on the SigmaStudio project that is
loaded. There is a project file on the website called “Stock_Firmware.dspproj” that will restore the
original firmware if you need It.
1. If choosing to do this step, it is highly recommended to tie one of the potentiometers of the
board to a master gain control (demonstrated in “Creating a basic SigmaStudio project for the
DSPB” above). Without this, it will not be possible to control gain without reconnecting to
SigmaStudio.
2. By this step, you should have successfully created a project and programmed it onto your DSPB
during the same session of SigmaStudio during which you will be writing to E2Prom. If you have
not successfully used the “Link Compile Download” button, you must before moving foward.
3. Right click your “ADAU1701” block and click “Write Latest Compilation to E2PROM”
4. In the window that opens, make sure the settings match what is in the screenshot below (they
are the default settings), and press OK.
a. NOTE: The ICP1 switch’s position must be at ‘1’ for this to work properly. If you get to
this point and realize it is set to ‘2’, you might be required to refollow the ICP1 sigma
studio connection guide again in order to write to E2Prom. Alternatively, try pressing
the reset button on the ICP1 after switching to ‘1’.